Version 2.12.1 release notes state.
Encryption: If you used OmniFocus 2.12 for Mac or OmniFocus 2.22 or 2.22.1 for iOS to migrate your database to the latest format and previously set a distinct encryption passphrase, please verify that your distinct passphrase is still in place. A bug (now fixed) may have re-linked your encryption passphrase to your sync password.
How would that be verified? OF > Preferences > Sync > Details > Encryption has change password and connect password. Both do not seem to be what I am looking for to verify my encryption password, right? Once encryption is enabled, is it enabled on all devices (macOS and iOS)? Maybe I am overcomplicating this matter, but I found the hint in the release notes quite alarming and without proper steps, it feels a bit odd, just ignoring a potentially wrong encryption password.